invective vs slam piece

invective

noun
  • Something spoken or written, intended to cast shame, disgrace, censure, or reproach on another. 

  • A severe or violent censure or reproach. 

  • A harsh or reproachful accusation. 

  • An expression which inveighs or rails against a person. 

adj
  • Characterized by invection or railing. 

slam piece

noun
  • A journalistic or other treatment which portrays its subject in a highly unfavorable manner. 

  • A sexual partner to whom one has no particular emotional attachment. 

How often have the words invective and slam piece occurred in a corpus of books? (source: Google Ngram Viewer )